tim 2 so biet tich cua no bang 78 va thuong cung bang 78
1) Hai so co hieu bang 17 .Neu lay so lon chia cho so be thi duoc thuong bang 2
va so du la 8.Tim hai so
tim cac so co hai chu so,biet rang moi chu so co tich hai chu so bang 18 va tong hai chu so bang 9
Tim tich cua hai so x va y. Biet rang neu tang x len 3 lan va y len 2 lan thi dc tich moi bang 72
2 so co tich bang 36 neu gi nguyen thua so thu nhat va them thua so thu thu hai 5 don vi thi duoc tich moi bang 56 tim thua so thu nhat thua so thu hai
cho phep chia 72/8.hay tim mot so sao cho khi lay so bi chia tru cho so do va lay so chia cong voi so do thi duoc hai so moi co thuong bang 1.
ket qua la :32. nhung co ai biet canh lam khong.
hai so co thuong bang 45.neu giu nguyen so chia va tang so bi chia len 2 lan thi thuong moi se bang bao nhieu?
tim 2 so co thuong bang 8 ,neu them vao so bi chia 18 don vi va giu nguyen so chia ta duoc thuong moi la 17
Tich cua ba so bang 24. Tich cua so thu nhat va so thu hai bang 6. Tich cua so thu nhat va so thu ba bang 8 .Tim ba so do.